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Contract OI history

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Nov 20, 2026 EXPIRATION

BSX $40.00 Put

BSX261120P00040000

Latest saved OI6,093Oct 23, 2026
Last change-160vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $40.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 6,2533,1260 2026-10-02: 5,649 OI2026-10-05: 5,696 OI2026-10-06: 5,756 OI2026-10-07: 5,859 OI2026-10-08: 5,859 OI2026-10-09: 5,967 OI2026-10-13: 6,156 OI2026-10-14: 6,156 OI2026-10-15: 6,146 OI2026-10-16: 6,170 OI2026-10-21: 6,253 OI2026-10-23: 6,093 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BSX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing6,093-160
Oct 21, 20266,253+83
Oct 16, 20266,170+24
Oct 15, 20266,146-10
Oct 14, 20266,1560
Oct 13, 20266,156+189
Oct 09, 20265,967+108
Oct 08, 20265,8590
Oct 07, 20265,859+103
Oct 06, 20265,756+60
Oct 05, 20265,696+47
Oct 02, 20265,649No prior observation